Aerial view of Long Sault Dam, ca. 1958Photo: Power Authority - State of New York, Courtesy: Stormont, Dundas and Glengarry Historical Society

Removal of cofferdam C-1, ca. 1958Photo: Power Authority - State of New York, Courtesy: Stormont, Dundas and Glengarry Historical Society

Frozen spray, ca. 1958Frozen spray accumulates on a safety net over the Stage I portion of the structure.Photo: Power Authority - State of New York, Courtesy: Stormont, Dundas and Glengarry Historical Society

Aerial view of Power Dam and switchyard in winter, ca. 1959Photo: Power Authority - State of New York, Courtesy: Stormont, Dundas and Glengarry Historical Society